﻿//    Copyright 2014 LuoZhihui
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//      http://www.apache.org/licenses/LICENSE-2.0
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.

#region  导入名称空间

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Autofac;
using Microsoft.Practices.ServiceLocation;

#endregion

namespace LotteryEngine.Infrastructure.CommonServiceLocator
{
	public class AutofacServiceLocator : ServiceLocatorImplBase
	{
		private readonly IComponentContext _container;

		public AutofacServiceLocator(IComponentContext container)
		{
			if (container == null)
			{
				throw new ArgumentNullException(nameof(container));
			}
			_container = container;
		}

		protected override IEnumerable<object> DoGetAllInstances(Type serviceType)
		{
			if (serviceType == null)
			{
				throw new ArgumentNullException(nameof(serviceType));
			}
			var type = typeof (IEnumerable<>).MakeGenericType(new Type[] {serviceType});
			return ((IEnumerable) _container.Resolve(type)).Cast<object>();
		}

		protected override object DoGetInstance(Type serviceType, string key)
		{
			if (serviceType == null)
			{
				throw new ArgumentNullException(nameof(serviceType));
			}
			if (key == null)
			{
				return _container.Resolve(serviceType);
			}
			return _container.ResolveNamed(key, serviceType);
		}
	}
}